Self Employed Couple looking to move from the UK later this year

Hi Everyone and thank you for letting us join your on line community.
We are a couple from the UK who are self employed (digital/online) and looking to make a move to Montenegro later in the year.

We were wondering if anyone knew of a van hire company with a branch in the UK that would let us drive the van to Montenegro then drop it off there?
Also we would like to rent initially and would love any recommendations for any realtors based in Montenegro that specialize with people coming from the UK. We have three tiny dogs that will be moving with us but they will be arriving separately with a pet moving company.
Our company will be registered off shore in the Isle of Man but we will be looking for an accountant in Montenegro to assist with our affairs so if anyone knows of an English speaking accountant any recommendations would be greatly appreciated. 
I do speak Croatian at a conversational level but I am bit rusty and I was hoping that would be a help when we moved.
Thanks for taking the time to have a read and any help/tips would be greatly appreciated. 
Thanks
Andy and Beth